Compilare: user.cpp: In function ‘int main()’: user.cpp:30:9: warning: unused variable ‘dim’ [-Wunused-variable] int dim; ^ user.cpp:31:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &p); ^ user.cpp:36:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &x, &y);//fin >> x >> y; ^